飞行仿真视景中的地形快速生成算法

Rapid Generating Method for Terrain Scene in Flight Simulation

在航空器飞行仿真中,地面大规模场景制约着仿真速度。为了快速生成地形场景,分析了航空器的视域特点,提出了飞行仿真的视域裁剪方法,确定了地面场景的视野范围,在保证显示质量的同时大范围降低了渲染数据;采用视点相关的LOD技术对场景进行有效简化,实现了大规模地形的实时显示;提出了视野区内背对观察者场景剔除方法和相关的节点评价算法。通过试验证实了该算法的可行性和有效性。

A large of ground scene restricts simulation speed in flight simulation. Based on the analysis of the aircrafts view field characteristic ,the method of confirming view field of flight simulation was proposed and the rendering data was decreased greatly. Used the view-dependent level of detail ,the scene was divided and the large scale terrain achieved display timely. What is more,a culling algorithm for the scene sheltered from the high field and an efficient related evaluation algorithm for node are proposed. The feasibility and validity of the method was approved by test.